7S 20A Daly Li-ion Battery Management System (BMS) with PWM

Overview:
The 7S 20A Daly Li-ion BMS with PWM is designed for 7-series lithium-ion battery packs with a continuous discharge current of 20 amps. Featuring PWM control for efficient charging/discharging, this BMS ensures battery safety, balancing, and extended lifespan.

Key Specifications:

• Battery Configuration: 7 cells in series (7S)

• Nominal Voltage: Approx. 25.9 V (3.7 V per cell × 7)

• Maximum Charge Voltage: 29.4 V (4.2 V per cell max)

• Discharge Cutoff Voltage: Around 2.8 V per cell (over-discharge protection)

• Continuous Discharge Current: 20 A

• Peak/Overcurrent Protection: Usually triggers at 30–40 A

• Short Circuit Protection: Instant shutdown with microseconds response time

• Cell Balancing: Passive balancing with 30–80 mA current per cell

• PWM Control: Uses Pulse Width Modulation for charging/discharging control to improve efficiency and thermal management

• Quiescent Current: Very low in microampere range

• Operating Temperature Range: -20°C to +60/65°C

• Physical Dimensions: Varies by model, typically compact

• Protection Features: Overcharge, over-discharge, overcurrent, short circuit, cell balancing, temperature monitoring (depending on model)

Additional Features:

• PWM (Pulse Width Modulation): Enhances charging and discharging efficiency by controlling power delivery through pulse modulation, reducing heat and improving battery longevity.

• Selectable Settings: Some Daly BMS units allow configuration of protection thresholds and balancing parameters.

• Chemistry Compatibility: Optimized for Lithium-ion (Li-ion) and NMC battery chemistries.

• Port Design: Available with either combined or separate charge/discharge ports depending on the model.

Applications:
Suitable for electric bikes, electric scooters, solar power storage, portable power banks, and other lithium-ion battery-powered systems requiring reliable management at 20A continuous current.